Finding the Fourth Proportional to 9,991,090.94, 13,786,935.89 and 5,640,607.26

Step by Step Solution

1. Step 1: Write the proportion equation
   9,991,090.94 : 13,786,935.89 = 5,640,607.26 : x
2. Step 2: Convert to fraction form
   9,991,090.94/13,786,935.89 = 5,640,607.26/x
3. Step 3: Cross multiply
   9,991,090.94x = 13,786,935.89 × 5,640,607.26
4. Step 4: Simplify right side
   9,991,090.94x = 77,766,690,646,085.52
5. Step 5: Solve for x
   x = 77,766,690,646,085.52/9,991,090.94
6. Step 6: Final answer
   x = 7,783,603.53